122results about How to "Improve the effect of surface modification" patented technology

The invention relates to a method for preparing hydrophilic PVDF microporous barrier. The principal raw material is polyvinylidene fluoride with the range of molecular weight: 5000 to 50000. It prepares hydrophilic PVDF microporous barrier by the method of separating solution and compounding dip-coating modification. It especially suits the occasion of effluent treatment, medicine separation and biochemy. The technology can prepare microporous barriers with plate type and hollow fiber type.

The invention relates to a method for preparing ultrafine platy copper-zinc alloy powder by using a horizontal stirring and grinding method, belonging to the technical field of preparation of metal powder material. The method comprises the steps of: mixing the copper-zinc alloy powder, grinding media and various grinding aids, putting the mixture into a sealed grinding bin of a horizontal high-energy stirring machine, introducing a protective atmosphere which mainly contains inert gas such as nitrogen and argon and the like, introducing water or oil with the temperature of 15-100 DEG C into a water cooling sleeve of a ball milling machine, controlling the rotating speeds at different stages, grinding, dispersing, modifying and grading the alloy powder to finally obtain copper alloy powder with the meshes of minus 300. In the method, the annealing process of the traditional method is abolished, and proper grinding process parameters are adopted, and the method has the advantages of short production process, high production efficiency, stable process and the like, and the prepared powder material has good platy effect and surface performance. The method also can be used for zinc-aluminum mixing ball milling and the production of powder such as zinc-aluminum alloy powder and the like, in which the degree of oxidation needs to be controlled.

This invention provides the periodic copolymer PCL-PEO-R which was polymerized with poly-epsilon-caprolactone and polyethylene glycol. The polymerization degree of PCL segment is between 10 and 1000, and the corresponding molecular weight is between 1000 and 100000; the polymerization degree of PEO segment is between 10 and 100, and the corresponding molecular weight is between 400 and 5000; the interval group between tertiary amine N and PEO is the alkyl made up of 2-10 carbon atoms, and the selective preference number of carbon atom is 2-4. The other two alkyls on the atom of tertiary amine N may be the same either the different methyl or ethyl. The alkyls which were used to composite phosphorylcholine were made up of the liner chain or the branched chain, and the saturated or the unsaturated alkyls with 1-20 carbon atoms. This invention also provides the preparation of the interpolymer, as well as its application in the preparation of biology medical material.

Drug delivery systems including a lipogel are disclosed. The lipogels allow for high drug loading and sustained release of drug molecules. Also disclosed are methods of making the drug delivery systems including lipogels.

The present invention provides methods and apparatuses for improving adhesion of dielectric and conductive layers on a substrate to the underlying layer. The methods involve passing a process gas through a plasma generator downstream of the substrate to create reactive species. The underlying layer is then exposed to reactive species that interact with the film surface without undesirable sputtering. The gas is selected such that the interaction of the reactive species with the underlying layer modifies the surface of the layer in a manner that improves adhesion to the subsequently formed overlying layer. During exposure to the reactive species, the substrate and/or process gas may be exposed to ultraviolet radiation to enhance surface modification. In certain embodiments, a single UV cure tool is used to cure the underlying film and improve adhesion.

A porous object comprising a three-dimensional network skeleton of a cured epoxy resin and having interconnecting pores, characterized in that the three-dimensional network skeleton forms a non-particle-aggregation type porous object constituted of a three-dimensional branched columnar structure, the proportion of aromatic-ring-derived carbon atoms to all the carbon atoms as a component of the cured epoxy resin is 0.10-0.65, and the porous object has a porosity of 20-80% and an average pore diameter of 0.5-50 μm.

The invention discloses a functionality calcium carbonate and a preparation method thereof. The functionality calcium carbonate is prepared by compound treatment technology of 'wet method + dry method' of superfine coarse whiting, fine calcium carbonate particle, nanometer calcium carbonate and a modification agent. The functionality calcium carbonate of the invention can promote resin plasticization, reduce melt viscosity, improve melt fluidity and melt intensity, make product surface smooth and fine and have the function of processing an addition agent ACR, and meanwhile is provided with the function of strengthening coupling and excellent surface modification effects. Appropriate increasing of padding of the system does not affect each performance index of the product. The functionality calcium carbonate and the preparation method thereof has the advantages of improving dispersivity and compatibility of each component of prescription system, improving plasticity of bonding strength of interface layer, having excellent interface layer performance, realizing the function of annealing strengthening and strengthening.

Provided is an organic semiconductor device, suitable for the integration, including an organic thin film transistor of low voltage drive and high driving current.

The organic semiconductor device including an organic thin film transistor comprising: a substrate (10); a gate electrode (12) disposed on the substrate (10); a first gate insulating film (15) disposed on the gate electrode (12); a second gate insulating film (17) disposed on the first gate insulating film (15); a source electrode (16, 20) and a drain electrode (18, 22) disposed on the second gate insulating film (17) and composed of a layered structure of a first metal layer (16, 18) and a second metal layer (20, 22); and an organic semiconductor layer (24) disposed on the gate insulating film (17) and between the source electrode (16, 20) and the drain electrode (18, 22). The first gate insulating film (15) is composed of an insulating film having a dielectric constant higher than that of the second gate insulating film (17), and the second gate insulating film (17) is composed of a silicon dioxide film thinner than the first gate insulating film (15), thereby providing a laminated type gate insulating film structure as a whole.

The invention belongs to the field of lithium ion secondary batteries, and more concretely relates to a surface modified lithium battery high-nickel anode material and a preparation method thereof. The method includes the following steps: weighing a certain amount of transition metal salt and high-nickel anode material, preparing a transition metal salt solution, making the transition metal salt solution drip into the high-nickel anode material and drying the high-nickel anode material, immersing and drying the high-nickel anode material many times till the whole transition metal salt solution drip into the material, continuing drying the high-nickel anode material and grinding the material, processing the ground material in an air furnace, and finally obtaining the high-nickel anode material the surface of which is wrapped in transition metal oxides. The high-nickel anode material prepared from the above method is used for preparing lithium ion secondary batteries. The surface modified high-nickel anode material enables the first-circle efficiency and the cycle performance of a secondary battery to be greatly improved. Moreover, the preparation method is simple and feasible, the surface modified high-nickel anode material is low in cost and suitable for large-scale production, etc.

The invention belongs to the technical fields of a nanometer material and lubricating oil, and discloses a surface modified nanometer material serving as a lubricating oil additive as well as a preparation method and an application thereof. The preparation method mainly comprises the following steps: putting a mixture of powder to be treated and a surface modification agent as well as grinding balls in a ball-milling tank of an improved dielectric barrier discharge plasma assisted mechanical milling device, feeding a discharge atmosphere medium, controlling the temperature of the ball-milling tank, adjusting discharge parameters, and starting the mechanical milling device so as to carry out dielectric barrier discharge plasma assisted mechanical milling, thus obtaining the surface modified nanometer material. The obtained powdery surface modified nanometer material can be added to the lubricating oil so as to improve the performance of the lubricating oil. The preparation method is simple to operate and good in controllability; the obtained surface modified nanometer material is small in particle size, high in activity, good in surface modification and extremely easy to deposit, flatly spread and diffuse on a mechanical friction surface and has excellent dispersion property in the lubricating oil, so that the friction of mechanical movement parts is reduced, and the worn surface is repaired.

The invention belongs to a wastewater treatment technology, relating to a method for coordinated pretreatment of nondegradable industrial wastewater by means of catalyzed iron reduction and anaerobic hydrolysis acidification. The method comprises the following steps: step 1, a catalytic iron filter material is prepared and pressed into a unitized catalytic iron filter material; step 2, a common anaerobic hydrolysis-acidification reaction tank is arranged; step 3, the catalytic iron filter material is put in the anaerobic hydrolysis-acidification reaction tank; and step 4, sewage is fed into the anaerobic hydrolysis-acidification reaction tank, flows through the catalytic iron filter material and is discharged, and the hydraulic residence time is between 3 and 8 hours for anaerobic hydrolysis-acidification reaction. The method not only removes poisonous functional group of poisonous contaminant so as to reduce the toxic action on anaerobe generated by the poisonous contaminant, but also hydrolyzes nonbiodegradable contaminant into easily biodegradable small molecular substance; therefore, the method improves the comprehensive biodegradability of wastewater, and has the advantages of high treatment efficiency and excellent treatment effect.

The invention relates to the technical field of nonmetal ore mineral materials and organic surface treatment. Easy-to-disperse sericite for cosmetics is characterized in that the sericite for cosmetics is used as a raw material, surface modification is firstly performed on sericite powder at a low temperature by using a surface treating agent and then high-temperature ageing modification is performed to obtain easy-to-disperse sericite for cosmetics, wherein the surface treating agent is obtained by mixing a modifying agent and a dispersing agent in a mass ratio of 1 to (1-10), the modifying agent is a mixture of any two or three of N-octyl triethoxysilane, polymethylhydrosiloxane and polydimethyl siloxane; the dispersing agent is isopropanol. The easy-to-disperse sericite for cosmetics prepared by the method is good in dispersion, excellent in glossiness, refreshing in skin feel and good in ductility, is in good fit with skin, can meet special needs of high-grade cosmetics and can be used as body pigments for being widely applied to various cosmetics fields.

The invention discloses a high-strength heat-conducting silica gel gasket and a preparation method thereof, and the high-strength heat-conducting silica gel gasket is suitable for the fields of heat dissipation of new energy lithium batteries and the like. A carbon fiber powder material is wetted and dispersed and surface modified by adopting an organic volatilizable dilution solvent and a coupling agent. A carbon fiber dispersion liquid is brushed on the upper surface of a substrate gasket. With the volatilization of the organic dilution solvent, carbon fibers can be arranged parallel to theplane of the heat-conducting gasket, so that the high heat-conducting performance of the carbon fiber material along the fiber axial direction is exerted, and the gasket has a good heat equalizing function in the plane direction of the gasket. The directionally arranged carbon fiber material can play a role similar to skeleton strengthening and greatly improve the etching and tearing and other mechanical properties of the gasket. In the high-temperature vulcanization process, the coupling agent which contains unsaturated groups and is bonded on the surface of the carbon fibers by chemical bonds can generate crosslinking reaction with hydrogen-containing silicone oil and vinyl on the surface of the gasket, thereby realizing firm connection between the carbon fiber material layer and the gasket and facilitating subsequent calendaring processing.

The invention discloses a polymer-based material with high density of energy storage and a preparation method thereof, pertaining to the technical field of the preparation of dielectric materials and energy storage materials. The polymer-based material with high density of energy storage comprises carbon nanotube materials and polymer matrix materials which are modified with organics by a chemical method in the proportions of 3 wt percent to 10 wt percent, and has the effects of good compatibility with the matrix, reduction in the leakage current density of the materials and dielectric loss and improvement of the dielectric constant and the breakdown field strength of the materials. The matrix material is polystyrene which is dissolved with ethyl acetate and then blended with modified carbon nanotube solution; the solution is then cast into a mould and the mould is formed by hot pressing and shaped by cold pressing. The polymer-based material with high density of energy storage of the invention is characterized by good insulation, low density, excellent toughness, low cost and easy processing, and can be applied to dielectric materials of electronic devices of information technologies, dielectric projects, electrostatic storage and capacitors.

Provided is a resin composition for electromagnetic interference shielding. More particularly, provided is a resin composition having superior dispersibility and impact relaxation and high conductivity, the resin comprising: (a) 100 parts by weight of a resin; based on 100 parts by weight of the resin, (b) 0.1 to 15 parts by weight of a carbon nanotube surface-modified in a condition of the absence of oxidant; and (c) 1 to 40 parts by weight of a carbon compound, a metal, a metal compound, or a mixture thereof. The resin composition for electromagnetic interference shielding, comprising a carbon hydride composite, is specifically useful in an electronic control unit material for weight reduction of car, and thus can be replaced with a high-priced heavy metal material.

Provided is a method of treating a metal surface, which can improve surface properties of a target metal, such as surface hardness and wear resistance in a simple manner and at low cost using very simple equipment alone, and which can prevent the deterioration of the metal to create high added value. The present invention is comprised of a method of treating a metal surface, characterized in that: heat-treating a target metal (10) to be surface-modified in nitrogen gas atmosphere (S), in such a state where the target metal (10) is buried in a carbon source powder (12) comprising a carbon powder and a powder of iron or an iron alloy mainly comprising iron and containing carbon, whereby the surface of the target metal (10) is at least nitrided or nitrogen-absorbed to modify the surface.

The invention provides a preparation method of high temperature resistance ultrafine active calcium carbonate, and relates to the technical field of preparation and processing of calcium carbonate powder. The preparation method comprises the following steps of S1, preparing an ultrafine calcium carbonate slurry; S2, adding a dispersing agent into the ultrafine calcium carbonate slurry prepared byS1, and aging for 24-144 hours to obtain an aged slurry; S3, adding a surface treatment agent to the aged slurry prepared by S2, carrying out an auxiliary catalytic reaction by microwave or/and high pressure, after the surface treatment is finished, dehydrating the slurry by pressure filtration, drying, and pulverizing to obtain the calcium carbonate. The surface treatment agent is surface-hydrophilically-treated fatty acid, and the surface treatment agent accounts for 3-5% the mass of the dry basis of the calcium carbonate. The ultrafine active calcium carbonate can maintain the activation degree at 350 DEG C, and do not volatilize and turn yellow. The ultrafine active calcium carbonate can be widely applied to products having a processing temperature of 270 DEG C or higher such as BOPP and the like.